y = -3x - 13 and 4x + 3y = - 24

y = -3x - 13 and 4x + 3y = - 24

Question
Linear equations and graphs
asked 2021-02-19

\(y = -3x - 13\) and \(4x + 3y = - 24\)

Answers (1)

2021-02-20

\(Y = - 3 X - 13\)
\(4 X + 3 Y = - 24 \)----------- compensate by \(Y = - 3 X - 13\)
\(4 X + 3 ( -3 x - 13 ) = - 24\)
\(4 X - 9 X - 39 = - 24\)
\(5 X - 39 = - 24\) --------- add 39 to both sides
\(5 X = - 24 + 39 = 15\)
\(5 X = 15\) ------- divide both sides over - 5
\(X = 15 / - 5 = -3\)
thus
\(Y = - 3 ( - 3 ) - 13 = 9 - 13 = - 4\)
Answer: --------- \(X = - 3 , Y = - 4\)

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